3sec Diary vs LazyDiary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
3sec Diary
Quickly log daily activities and feelings in just three seconds. Your entries are securely stored in your iPhone Calendar, ensuring data safety and easy access. This tool helps you preserve memories and makes research and sharing effortless.
- 3-second daily logging
- Calendar integration
- Secure data storage
- Easy research and sharing
- Memory preservation
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This "3sec Diary” is not just a diary. You can input what you did, how you feel in this tool.It will take only 3 seconds!Your time will be saved. And you can leave it on your calendar on iPhone as long as you want. "3sec Diary “ data is not recorded on App on your iPhone.The data is recorded to your iPhone Calendar.You never miss your data when something wrong with this App. Researching ,synchronizing,sharing are so easy. This “3sec Diary” is not just a diary, but your memories.
LazyDiary
This app simplifies daily journaling by allowing users to record thoughts like notes, line by line. It integrates with your calendar to suggest topics and sends daily reminders to help build a consistent habit. A clean, secure interface with password and biometric unlock ensures privacy.
- Note-style recording
- Calendar integration for prompts
- Daily notification reminders
- Simple, intuitive design
- Password and biometric security
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LazyDiary is a diary app that specializes in "keeping going". LazyDiary was developed based on the developer's own problem of not being able to keep up with any diary. - Record as if you were taking notes. If you try to write perfectly, you will not know where to start. LazyDiary allows you to keep a diary in a simple and easy manner by recording what happened in fragments, line by line, just like a note. Even on days when you are tired, you can keep a diary as if it were a note, making it easy to continue to keep a diary every day. Of course, you can also record detailed information. - Never be at a loss for things to write about. LazyDiary automatically displays your schedule for the day by connecting to your calendar. This makes it easy to look back on the day and smoothly start writing in the diary. Even if you forget to keep a diary for a few days, you can easily keep a diary by checking the day's schedule. - Daily notifications make it a habit. Daily notifications help you keep a diary habit by sending you notifications at set times each day. - Simple design that you will never get tired of. Because it is an app that you touch every day, we paid special attention to the design. The simple design allows you to keep track of your daily activities intuitively without getting lost in the operations. - Security. You can set a password when you start the app to further enhance your privacy. You can also unlock the app with fingerprint or face-ID.
Screenshots
Verdict
The clearest difference is review sentiment: LazyDiary at 100% against 3sec Diary's 60%. LazyDiary also leads on in-app purchases (none vs 1) and update cadence (every 4 days vs every 26 months). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. 3sec Diary sells 1 one-off in-app purchase. LazyDiary asks for nothing beyond the download.
3sec Diary ships an update every 26 months, LazyDiary every 4 days. The most recent releases landed on July 4, 2026 and September 26, 2026 respectively.
| Parameter | 3sec Diary | LazyDiary |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.9 (11 ratings) — better |
| Positive reviews | 60.0% of reviews | 100.0% of reviews — better |
| Number of ratings | — | 11 — better |
| Update frequency | Every 26 months | Every 4 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 12 MB | 75 MB |
| Age rating | 4+ | 4+ |
| Developer | KENJI KANEMOTO | Ryunosuke Nagase |
Customer experience
3sec Diary
LazyDiary
In-app purchases
3sec Diary
- Eliminate Ads$0.99
LazyDiary
No in-app purchases
Questions
Is 3sec Diary free?
Is LazyDiary free?
Do 3sec Diary or LazyDiary have ads?
Which is updated more often, 3sec Diary or LazyDiary?
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